Sawing machine



Feb. 13, 1923..

A. S CRAVEN SAWING HINE Fil d Apr. 7, 1920 2 sheets-sheet l A M/E Feb. 13, 1923.

A. S. CRAVEN SAWING MACHINE Fileii Apr. '7, 1920 2 sheets-sheet 2 mm 9% %m m N Patented Fain. 13, 1923..

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AARON SANFORD CRAVEN, OF OAK LANE, PENNSYLVANIA.

SAWING MACHINE.

Application filed April 7, 1920. Serial No. 371,792.

To all whom. it may concern Be it known that I, AARON SANFORD CRAVEN, a citizen of the United States, residing at Oak Lane, in the county of Philadelphia and State of Pennsylvania, have 1nvented certain new and useful Improvements in Sawing Machines, of which the following is a specification.

My invention relates to improvements in sawing machines for the transverse cutting of standards such as piles, posts,utree trunks, etc.

The object of the invention is to provide a sawingmachine of novel, simple and efficient construction which may be readily applied to and removed from standardsto be cut and which may be quickly and easily adjusted into a position to insure a perfectly level or horizontal out irrespective of any variation in the standard from a true vertical position or from a position extending at right angles to a level or horizontal plane.

The invention is particularly adapted for use in cutting off the upper ends of previously driven piles wherethe upper ends of the cut piles are to be perfectly level at a predetermined horizontal plane, and where the driven piles do not always occupy true vertical, positions, and where the bodies thereof at or near the level where they are to he out do not extend at right angles to the cutting level. I i I With the above and related objects in view, the invention consists in the novel construction, combination and arrangement of parts hereinafter described and claimed.

In the accompanying drawings, illustratin my invention, %igure 1 is a side view, partly in section, of a sawing machine embodying my invention applied to a pile or standard for cutting the same.

Figure 2 is-a' detail of the indicator for indicating the position of the saw relatively to apart of the standard.

Figure 3 is a top view, partly in section, of the machine applied to the pile or standard.

Figure 4 is a transverse section through a part of the saw and its supporting and guiding means,on line 4-4 of Fig. 3.

Figure 5 is a view of the outer end of a part of the supporting bracket-and a part of the adjustable frame thereon which carries the saw, showing pivotal connection between them.

chine.

Referring to the drawings, 2 designates a bracket comprising a long horizontal supporting bar 3, an arm 5 extending downwardly from a point near one end of the bar 3, an inclined brace bar 6 connecting the arm 5 and bar 3, a horizontally-extending transverse bar 7 connected at its central portion to one end of the bar 3 and being curved, asshown in Fig. 3 to fit against one side of a round pile or standardS, and a horizontally-arranged transverse supporting and guiding bar 9 mounted on the bar 3 in spaced relation to the bar 7 and provided with brace arms 10 connecting it with the bar 7. i

Screwed into and through one end portion of the bar 7 is a screw 11 having a head 12 on one end thereof, by means of which it may be manually turned, and having a swivel 13 on the other end thereof. The swivel 13 is permanently attached to one end of a chain 14 Which is adapted to extend around and embrace the pile or standard 8 which is to be cut by the ma- The other end of the chain 14 is adapted to be connected to the end portion of the bar 7 opposite to the end portion carrying the screw 11; andithe preferred means for thus connecting the normally loose end portion of the chain 14 is the hook 15 formed on the end of the bar 7 and to which any one of the links of the chain 14 may be applied, in accordance with the length of the chain 14.- required to properly embrace the particular pile or standard to which the machine is attached, as will be hereinafter explained.

The lower end portion of the arm 5 carries a screw 40 which is screwed into and through the arm 5 and has a head 41 formed on one end thereof by means of which it may be turned by hand. The other end of the screw 40 is pointed, at 42, as shown. The pointed end49 of the screw 4-0 is adapted to be forced into the pile or standard to which the bracket 2 is applied, and the flange or shoiillder 4-3 is adapted to engage the pile or standard and limit the extent of penetration of the pointed end 42; and. when the screw 40 is thus engaged with the pile or standard. it is adapted to support the bracket 2 against downward tilting, as will hereinafter appear. 7 r

Mounted on the bracket 2 is an adjustable frame 16 which; carries the saw 17.and a suitable motor 18 for actuating the saw.

plate 25 away The motor herein illustrated'is a reciprocating pressure fluid engine which may be of any approved type operated by any suitable pressure fluid,'suc'h as coiiipressed"air, stean'i or gas. The motor 18 includes a horizontally arranged cylinder 19, a piston 20 therein adapted to be reciprocated by thepressure fluid, and a rod 21 extending from the piston andout through one end of the cylinder 19. The frame 16 herein illustrated is a casting comprising the motor cylinder 19, :a pair of spaced parallel armsz22'extending horizontally from one end of the cylinder 19 and spaced crossbars 23 connecting the arms 22. The opposing faces of the arms .22 have iongitudinally-extending parallel. guiding grooves or channels 2 1 formed therein for the reception of the liateral edge portions of a plate 25 which is slid-ably fitted to the grooves 24 to be recipro'cated therein. One

end portion of the plate 25 is provided with an upwardly-extending lug 26 which is connected to the outer end of the piston rod'21, whereby whenpressure fluid is supplied to the motor 1.8 to actuate the piston'20, the slide plate 25 will he reciprocated within the grooves 24 Secured upon the end portion of the slide from the lug 26 by means of cap screws 27 is one end portion of the saw 17 which is arranged horizontally and providedwith suitable cutting teeth 28 along; one otitS longitudinal edges. The saw 17 projects beyond the end of the frame 16 and it is reciprocated by and with the slide plate 25 to effect the cutting operations when the machine is in service.

The outer end of the frame 16 is pivotally connectedto the outer end of the bracket 2 by means of apivot pin 29 and a bracketBO The bracket 30 is seembracing the same.

wall of the cylinder cured to the outer end 19 whichforms part ofthe frame '16, and

the pin 29 is formed on thebracket 2 and projects upwardly therefrom and is provided with a flange or collar 31to engage the bottom of the bracket and limit its downward'movement on the pin 29. The frame 16 and the parts carried thereby may be readily removed from orreplaced upon the bracket 2 by withdrawing the bracket 30 from and replacing it upon the pin 29.

'VVhen the frame 16 is in place upon the bracket 2 the end' portion thereof awayfrom the pivot pin 29 rests upon "the bar 9 which supports and guides the frame 16 and permits it to be moved back and forth on the pivot pin 29 from side to side of the bracket 2.

The end portion of the frame 16 carrying the motor 18 is provided with a handle 32 andthe opposite endportion of the frame 16 is provided with side handles 33, asillus trated'inthe drawings. Thedrame 16and parts carried thereby may be readily rethe frame 16 may tilting of the moved from or replaced upon the bracket 2 by means of the handles 32 and 33; and be readily moved from sideto si'deon the pivotpin 29 by means of the handles 33.

Pivoted, at 3 1, to the central portion of the bracket bar 7 is an indicator arm 35 which is movable from the position shown by dot-and-dash lines inrl ig. 2 to theposition shownnin full lines therein and back again, and which is "adapted to be held by ztr'iction in the position to'which it is moved. The upper end of theindicator arm 35is in the same plane with the lower 'tace ofthe saw blade 17, when the arm 35- is up in the position shown by full lines to indicate the plane through which the saw will make a cut when operated.

The operation of: lows: j

The frame 16 is removed from the bracket 2, the indicator 35 iszr aised to theposition shown by full lines in Fig. 2, and the curved central portion of the bracket bar 7 is placed against one side of the pile 'or standard 8 to be cut with: the upper end of the indicator 35 in registry with amark previously the machine is as folit is desired to cut the samei, The chain 14 is then drawn around the pile in close engagement therewith and Tone-- of the chain links is engaged withfithe hook 15, the several links of the chain providing a quick level or true horizontal position, whereupon the pointed end 42 of the screw lOis pressed into the pile 8 to prevent :further lateral bracket 2. The spirit level is then'placedlupon the bar 3 and the'screw 10 is manipulated by hand until thebar 3 is adjusted into a perfectly level or true horizontal position.

When the bracket 2 has been thus applied to a pile and adjristechthe sawblade" 17 will be level or horizontal andzin the same plane with the mark on-the pile 8 when the frame 16 is placed uponcthe bracket 2 as shown in the drawings. 7

hen the bracket 2 is attachedtoan inclined pile or standard oran inclined portion thereof, the bar? 7 is always placed against the lower sideof the 'inclined'fportion of the pile tojwhicln it is applied .to pre vent gravity action from loosening the chain 1 1.v 1

After the bracket 2 has been attachedito the pile 8, the indicator 35 is turned down 'ma'de'on the pile at the plane or place where v and the frame 16 is placed upon the bracket with the saw 17 at one side' of and its teeth 28 facing the pile 8. The pressure fluid is then turned into the motor 18, cansing the actuation thereof and the reciprocation of the saw 17. vVhile the saw 17 is being reciprocated, the frame 16 is moved on the pivot pin 29 to the pile 8 to thereby cut the same.

Wren a number of piles or standards are to be out, two brackets such as 2 may be employed with one frame 16,. so that while workmen are manipulating the frame 16 on one bracket applied to a pile to cut the same, other workmen may be applying the other bracket to a pile to receive the frame 16 for the next cutting operation. Thus much time can be saved by applying the frame 16 to the two brackets in alternate succession.

While the bracket may be adjusted to cause the saw 17 to make a perfectly level or true horizontal cut, it may also be adjusted to causethe saw 17 to make an inclined cut when desired.

I claim as my invention:

1.. In a sawing machine, the combination of a bracket, means for attaching the bracket to a standard in difierent positions of adjustment, a movable saw supported by the bracket and operable to out said standard, and an adjustable indicator carried by the bracket and movable to a position indicating the plane of movement of the saw relatively to a part of said standard.

2. In a sawing machine, the combination of a bracket, means for attaching the bracket to a standard in different positions of adjustment, a movable saw supported by the bracket and operable to out said standard, and an indicator arm pivoted on the bracket and movable into and from an operative position indicating the plane of movement of the saw relatively to a part of said standard.

3. In a sawing machine, the combination of a bracket, means for attaching the upper portion. of the bracket to a standard, a movable saw supported by the bracket and operable to out said standard, the lower portion of the bracket being laterally adjustable pass the saw 17 through relatively to the upper portion of the bracket when it is attached to the standard to vary the angle of the saw laterally, and means carried by the lower portion of the bracket and adapted to engage said standard and to be operated to adjust the lower portion of the bracket toward or from the standard to vary the angle of the saw longitudinally.

a. In a sawing machine, the combination of a bracket, means for attaching the upper portion of the bracket to a standard, a movable saw supported by the bracket and operable to out said standard, the lower portion of the bracket being laterally adjustable relatively to the upper portion of the bracket when it is attached to the standard to vary the angle of the saw laterally, and a screw adjustably engaging the lower portion of the bracket and adapted to engage said standard and to be operated to adjust the lower portion of the bracket toward and from the standard to vary the angle of the saw longitudinally.

5. In a sawing machine, the combination of a bracket comprising a long, horizontal bar, a downwardly extending bar on one end portion thereof, an inclined brace connecting the other end portion of the horizontal bar and the lower end portion of the downwardly extending bar, and a transverse, horizontal bar extending from the respective sides of the first named bar adjacent to the upper end portion of the second named bar, means to connect the respective ends of the transverse bar to a standard, means on the lower end portion of the downwardly extending bar to engage the standard, a horizontally-movable frame pivoted to the first named bar remote from the second named bar, a horizontal guiding bar secured to the first named bar for supporting said frame between its pivot and the second named bar, and a movable saw guided by said frame and adapted to be operated to cut the standard.

In testimony whereof I affix my signature hereto.

AARON SANFORD CRAVEN. 

